Hi - I bought a used Apple Macbook Pro 15.4" Laptop Mjlt2Ll/A last week on eBay and received the unit today. The shipment came with the Macbook Pro and charger only. Seller has over 250+ feedback. The seller had mentioned it is in excellent condition, and it is in very good condition, only concern is small nick on corner for which I've already taken pictures to share with seller. Need input/advice on what to check to ensure this is a smooth transaction, this is what I have done: a) Checked Serial Number, warranty is valid till July 2016, with option to purchase Applecare b) I chatted with Apple Support to verify hardware information. I went inside About Mac > System Report > Verified all hardware specifications c) System Report > Checked Battery Cycle Count> It is at 28 d) Verified microphone jack and USB ports using external hard drive. e) Did 4K video clip test on youtube, looks great. Verified speakers work fine. f) Ran Apple Diagnostics at Boot, results come fine with no issues/warnings/etc. g) Did all software updates including OS, no issues. Still to do: h) Check all keys on the keyboard, so far seems to be working fine but will have to press each individually to make sure all work. i) Run dead pixel test on screen, the screen looks great but to double check. j) Test HDMI port on Macbook Pro Any other suggestions on what else I should check? Thanks!